A research group is on a college campus and is conducting a survey regarding the coffee consumption of college students in America. Which of the following techniques would probably produce a sample that is most representative of the population? Survey a randomly selected group of students that walk into the campus coffee shop.
Survey all students whose last name begins with R.
Survey a randomly selected group of students from an all-campus event.
Survey all students that attend their early morning class on a certain morning.

If the function m(x) has the point (5,2) on its graph name a point that would be on the funtion m(5x)

The investigating team suspected that there were differences in the cost of repairing cars in workshop i and workshop ii. the investigating team suspected that the costs raised by workshop i were greater than workshop ii. for that they tested the repair of 15 cars in each workshop to see the cost of repairs.the decision of the right hypothesis to prove the suspicion above is a. h0 : μ1- μ2­ = 0; ha : μ1- μ2­ ≠ 0 b. h0 : μ1- μ2 ≥ 0; ha : μ1- μ2 < 0 c. h0 : μd ≥ 0; ha : μd < 0 with μd = μ2- μ1 d. h0 : μd = 0; ha : μd ≠ 0 with μd = μ2- μ1 e. h0 : μ1- μ2 = 0; ha : μ1- μ2 ≥ 0

Find 63% of 77. a. 0.485 b. 48.5 c.0.818 d.81.8